无线传感网低开销型数据可靠传输方法的研究

利用GPRS网络实现传感数据远程采集的无线传感网应用已经得到越来越广泛的运用。由于GPRS网络不稳定,传感节点传输常会出现数据丢包。如何保证电池供电的传感节点数据可靠传输,同时降低传感节点传输开销,延长传感网整体寿命是个很重要的研究课题。分析了RMST、ESRT和PSFQ等无线传感网络协议在该数据传输问题中的适用性,提出了一套拥塞控制型数据分包传输协议CCDS,协议具备拥塞控制、选择性重传等特性。通过理论分析仿真、实验测试,对比了CCDS与RMST的传输开销,验证了CCDS协议在传感器节点数多、网络不稳定的环境下,数据可靠传输的低开销性,从而延长无线传感网整体寿命。

Research on lower overhead reliable transport method in wireless sensor network

In wireless sensor network, remote sensing data collection application based on GPRS is more and more widely used. Data lost occur due to the unstable of GPRS. How to ensure the reliable data transport under limit power supply and lower the transport overhead in unstable wireless sensor network environment is a fatal problem. Some major data transport protocols in wireless sensor network including RMST, ESRT, PSFQ as well as their adaptive in the transport application are briefly introduced. Congestion control data sub-packet protocol features congestion control and optional re transmit is what this article focus on. The results of theoretical analysis, simulation and spot tests show that the protocol aroused in this article is of lower overhead than RMST. In addition, this protocol reduces the transport consumptions and extends the living time of the whole wireless sensor network.